(n1: Person { name: "Alice", age: 23, aliases: [] });
(n2: Person { name: "Bob", aliases: ["Bobby", "Bob" ] });
(n3: Person { name: "Carol", age: 43, aliases: ["Caroline" ] });

// Has 2 ages
(n4_wrong: Person { name: "Dave", age: [ 43, 23 ] , aliases: ["David" ] });

// Doesn't have aliases
(n5_wrong: Person { name: "Dave", age: 43  })


